Rieco Titan 55141 Truck Camper Jack Four Corner Bracket Kit - White
These are much beefier in both thickness and mounting area than the OEM jack stand brackets on my 1994 Lance. Only downside is that it seems like the sleeve doesn't mount as tightly because of the thicker plates. It remains to be seen if that will be a problem requiring a different solution. But the plates themselves are awesome quality and a fair price and it's possible they aren't designed for my jack stands so I won't hold that against them.